Toán Lớp 8: thực hiện phép tính
(x^3+2x^2-2x+3) : (x+3)
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Toán Lớp 8: thực hiện phép tính
(x^3+2x^2-2x+3) : (x+3)
Comments ( 1 )
=(x³-x²+3x²+x-3x+3):(x+3)
=[(x³-x²+x)+(3x²-3x+3)]:(x+3)
=[x(x²-x+1)+3(x²-x+1)]:(x+3)
=(x+3)(x²-x+1):(x+3)
=x²-x+1
Vậy (x³+2x²-2x+3):(x+3)=x²-x+1